Table 1.

Multi-exponential fit parameters to transient absorption data (810 nm pump, 750 nm probe).

parameters	Sepia eumelanin	black hair	synthetic pheomelanin	red hair
A1	0.68 +/− 0.10	0.73 +/− 0.05	0.60 +/− 0.04	0.49 +/− 0.04
τ1 (ps)	0.38 +/− 0.10	0.36 +/− 0.06	0.47 +/− 0.07	0.53 +/− 0.10
A2	0.24 +/− 0.10	0.20 +/− 0.04	0.35 +/− 0.05	0.38 +/− 0.04
τ2 (ps)	2.2 +/− 0.9	2.2 +/− 0.6	2.4 +/− 0.4	3.3 +/− 0.6
A3	0.06 +/− 0.02	0.04 +/− 0.01	0.048 +/− 0.01	0.11 +/− 0.02
τ3 (ps)	64 +/− 35	80 +/− 60	38+/− 13	41 +/− 20
A4	0.02 +/− 0.005	0.03 +/− 0.004	0.002 +/− 0.001	0.02 +/− 0.006
τ4 (ns)*	200 +/− 80	160 +/− 30	220 +/− 190	100 +/− 70

^*τ₄ was determined by examining the phase shift of data before time zero analogous to frequency domain fluorescence lifetime measurements.